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Finding the Fourth Proportional to 58.61, 80.79 and 47

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Solution

The fourth proportional to 58.61, 80.79 and 47 is: 64.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.61 : 80.79 = 47 : x
  2. Step 2: Convert to fraction form
    58.61/80.79 = 47/x
  3. Step 3: Cross multiply
    58.61x = 80.79 × 47
  4. Step 4: Simplify right side
    58.61x = 3,797.13
  5. Step 5: Solve for x
    x = 3,797.13/58.61
  6. Step 6: Final answer
    x = 64.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.